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M V u. a QN ,f xl d Z P l .f n a. l nl mg 4 --.r ||||n|5||ll -IxixMINIMUM H I I l I I I l I I l l l l A l l l I I I l l l l l l I Illlinventor: y?

Witnesses' PATENT OFFICE.

J. WARREN THYNG, OF SALEM, MASSACHUSETTS.

PAPER-GAGE FOR PRINTING-PRESS ES.

Specification forming part of Letters Patent No. 56,123, dated July l,1866.

To all whom 'it may concern:

Be. it known that I, J. WARREN THYNG, of Salem, in the county of Essexand State ot' Massachusetts, have invented an Improved Gage for thePlatens of Printing-Presses to determine the position of the sheets ofpaper as they are laid upon the form for printing; and I do herebydeclare that the following is a full and exact description thereof,reference being had to the accompanying drawings, making part of thisspecification- Figure lbeinga top view of the gage as applied to theplaten of a printing-press; Fig. 2, an end view thereof; Fig. 3, atransverse section of the gage through one of the adjusting-clamps.

Like letters designate corresponding parts in all of the figures.

The object of this invention is to furnish an exact guide for laying thesheets of paper on the form so that they shall all be printed uniformlyand with even margins. The gage is applied to the back or lower edge ofthe platen A of a printing-press.

The particular construction of the several parts of the gage may bevaried at pleasure if the principle of its action is `not departed from.As represented, it has a long bar, B, screwed or otherwise fastened tothe platen, and provided with a longitudinal groove, b, in its upperside for the reception of the adjustingclamps C C C, which have hooks orside projections, c c, tting into an offset of the groove, substantiallyas shown, to hold the clamps in the grooves, but not to interfere withtheir sliding lengthwise therein. Through the clamps C C G pass thegage-rods F F G, and they are secured in any position by means ofthumb-screws 1) D D, which clamp the rods firmly down upon the face ofthe gagebar B.

The gage-rods F F gage the rear or lower edge of the sheet of paper inrelation to the form, (indicated by red outlines 60,) and there shouldbe two of them, and may be more, if the form is long. They may havewidened ends or heads for the edge of the paper to touch and restagainst.

The gage-rod Gr is to gage the transverse position of the sheets ofpaper, and is placed at either side edge thereof. It necessarilyprojects farther forward than the back gages, F F, and has a widened endor head, g,.paral lel with the rod itself, for the paper to touch andrest against.

The rods F F have to project forward equally, and to facilitate thedetermination of their positions theyhave scales yyof inches andsubdivisions thereof marked upon them. The side gage-rod G, having to beadjusted only sidewise, the scale m of inches is marked upon thegage-bar B, numbering from the center 1 to the ends thereof.

The height of the gage-bar B is such that the gage-rods will presenttheir heads opposite to the edges of the paper as it is placed upon thetypes.

In order to adapt the gage-rods to different sizes of platens and thevarying sizes of the forms, I contemplate jointing them, as shown, byone of the rods F F in Figs. l and 2. The parts h It are so connectedwith one another by joints i 'i that they will double together in onedirection only, as seen in Fig. 2, but will be sufficiently rigid whenstraightened out. A spring may help to keep the jointed portionsextended. Thus the projecting ends may be doubled together ont of; theway, enabling gage-rods of any length to be used.

This gage does not interfere with the nippers H H, (shown by red linesin Fig. 1,) nor with any part or operation of printing-presses.

What I claim as my invention, and desire to secure by Letters Patent,is-

The combination and arrangement of the graduated grooved bar B, attachedto the edge of the platen, the adjustin g-clani ps C C O, and gage-rodsF F Gr, substantially as and for the purpose herein specified.

` The above specification of my improved gage for holding sheets ofpaper ou the p1atens of printing-presses signed by me this 16th day ofNovember, 1865.

J. WARREN THYNG.

Witnesses:

JOHN B. PARKER, WILLIAM A. BABBIDGE.

